Mole Conversion and Significant Figures

The video tutorial demonstrates a one-step mole conversion from liters to moles using CO2 as an example. It begins by setting up the conversion with a given volume of CO2, then uses a railroad track method to cancel out units and convert to moles. The calculation involves multiplying and dividing by conversion factors, with attention to significant figures. The final result is rounded and presented as moles of CO2.

What is the initial quantity of CO2 given for the mole conversion?

• 10.00 L

• 9.99 L

• 8.88 L

• 11.11 L

What method is used to set up the conversion from liters to moles?

• Cross-Multiplication

• Railroad Track Method

• Factor Label Method

• Dimensional Analysis

What is the conversion factor used to convert liters of CO2 to moles?

• 1 mole = 18.0 L

• 1 mole = 20.0 L

• 1 mole = 22.4 L

• 1 mole = 24.0 L

After canceling out the units, what is the remaining unit in the conversion?

• Kilograms of CO2

• Moles of CO2

• Grams of CO2

• Liters of CO2

What is the result of dividing 9.99 by 22.4 in the calculation?

• 0.443

• 0.444

• 0.442

• 0.445

How many significant figures should the final answer have?

• Two

• Three

• Four

• Five

What is the final rounded result of the mole conversion?

• 0.4425 moles

• 0.4423 moles

• 0.4424 moles

• 0.4426 moles

Why do we ignore the significant figures of the constant in the calculation?

• Because it is a measured value

• Because it is a defined constant

• Because it is an estimated value

• Because it is a variable